Browser Hijacked - Desperately need help

Hi all,
a couple of days back I got what I believe is a browser hijacker; i.e. every search looks normal but the links go to advertising sites. I have absolutely no experience with computer maintanence or anything of the sort, and have been trying in vain to fix it. I have downloaded several anti-soyware/adware programs so if they show up in my HJT log thats why, and I'd feel fine to delete them.

I downloaded HJT after looking on these forums and seeing it's commonly done. I will post the log, but I don't know if I'm doing anything right. If not, I'll make any changes you say. Thanks for any help I receive! It's a windows Xp.
Moderator Edit:
Pasted log removed
All logs must be attached
By the way, you only need 1 post count to attach logs, your 5 other Spam posts (Post#1.. Post#2...etc) - removed